EP0566360A1
Expired / Lapsed
EP
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Process for the production of substrate for printed wiring
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1993-04-13
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Granted: —
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Expires: 2013-04-13
Abstract
Abstract The process comprises the production of a substrate for printed wiring, which has high thickness accuracy and permits the formation of a printed wiring network by most general methods such as wet electroless copper plating without impairing the excellent properties of an inorganic continuous porous material such as a low coefficient of thermal expansion, high heat dissipation properties and high machinability, the process comprising wrapping a thick plate-like inorganic continuous porous material (I) with a cloth or paper (IV), impregnating the wrapped inorganic continuous porous material (I) with a thermosetting resin (II) under reduced pressure, curing the thermosetting resin to form a composite material(III), and slicing the composite material (III) into substrates having a predetermined thickness.
Inventors
- 👤 Kazuyuki c/o Mitsubishi Gas Chemical Co.Inc Ohya
- 👤 Norio c/o Mitsubishi Gas Chemical Co. Inc Sayama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 05:17
CPC Classifications
H; H05; H05K; H05K3/00; H10; H10W; H10W70/00; H10W70/60; H10W70/67; H10W70/69; H10W70/692; C; C04; C04B; C04B35/00; C04B35/622; H05K3/0011; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K2201/00; H05K2201/01; H05K2201/0104; H05K2201/0116; H05K2203/00; H05K2203/02; H05K2203/0235; H05K2203/11; H05K2203/1147
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
66 words
A process for the production of a substrate for printed wiring, which comprises wrapping a thick plate-like inorganic continuous porous material (I) with a cloth or paper (IV), impregnating the wrapped inorganic continuous porous material (I) with a thermosetting resin (II) under reduced pressure, curing the thermosetting resin to form a composite material (III), and slicing the composite material (III) into substrates having a predetermined thickness.
Claim 2
Dependent Claim
66 words
A process for the production of a substrate for printed wiring, which comprises wrapping a thick plate-like inorganic continuous porous material (I) with a cloth or paper (IV), impregnating the wrapped inorganic continuous porous material (I) with a thermosetting resin (II) under reduced pressure, curing the thermosetting resin to form a composite material (III), and slicing the composite material (III) into substrates having a predetermined thickness.
Claim 3
Dependent Claim
31 words
A process according to claim 1, wherein the inorganic continuous porous material (I) has a porosity of 10 to 40 % and an average pore diameter of 0.1 to 10 µm.
Claim 4
Dependent Claim
30 words
A process according to claim 2, wherein the inorganic continuous porous material (I) has a porosity of 12 to 30% and an average pore diameter of 0.5 to 6 µm.
Claim 5
Dependent Claim
63 words
A process according to any one of the preceding claims wherein the inorganic continuous porous material (I) is formed of aluminum nitride-hexagonal boron nitride (AIN-h -BN), alumina-hexagonal boron (A1 2 0 3 - h-BN), zircon oxide-hexagonal boron nitride (Zr0 2 -h-BN), silicon nitride-hexagonal boron nitride (Si 3 N 4 - h-BN), hexagonal lattice boron nitride (h-BN), β-wollastonite (β-CaSiO 3 ), mica or Shirasu.
Claim 6
Dependent Claim
26 words
A process according to any one of the preceding claims, wherein the cloth or paper (IV) is a glass woven fabric or a glass unwoven fabric.
Claim 7
Dependent Claim
46 words
A process according to any one of the preceding claims, wherein the wrapped inorganic continuous porous material (I) is an integrated block prepared by stacking a plurality of inorganic continuous porous materials to form a pile and wrapping the pile with the cloth or paper (IV).
Claim 8
Dependent Claim
55 words
A process according to claim 6, wherein the integrated block is prepared by stacking a plurality of inorganic continuous porous materials one on another through one or more layers of the same cloth or paper as the cloth or paper (IV) to form a pile and wrapping the pile with the cloth or paper (IV).
Claim 9
Dependent Claim
32 words
A process according to any one of the preceding claims, wherein the inorganic continuous porous material (I) is preliminarily heat-treated under reduced pressure before it is impregnated with the thermosetting resin (II).
Claim 10
Dependent Claim
25 words
A process according to claim 8, wherein the preliminary heat-treatment is carried out at 70-250°C under 30 mmHg or less for 0.5 to 72 hours.
Claim 11
Dependent Claim
24 words
A process according to any one of the preceding claims, wherein the thermosetting resin (II) is a resin which is cured by addition polymerization.
Claim 12
Dependent Claim
34 words
A process according to any one of the preceding claims, wherein the thermosetting resin (II) is degassed by heat-treating it under reduced pressure before the wrapped inorganic continuous porous material (I) is impregnated therewith.
Claim 13
Dependent Claim
60 words
A process according to any one of the preceding claims, wherein the wrapped inorganic continuous porous material (I) is impregnated with the thermosetting resin (II) by replenishingly supplying the thermosetting resin (II) from under the inorganic continuous porous material (I) at a spontaneous impregnation rate at a temperature at which the thermosetting resin (II) is maintained in a liquid state.
Claim 14
Dependent Claim
41 words
A process according to any one of the preceding claims, wherein the composite material (III) is sliced into substrates after the removal of cured resin and the cloth or paper (IV) which cover sides at right angles with the slicing direction.
Claim 15
Dependent Claim
25 words
A process according to any one of the preceding claims, wherein the composite material (III) is sliced with a multiwire saw or a multiblade saw.
Claim 16
Dependent Claim
21 words
A process according to claim 14, wherein the multiwire saw or multiblade saw is a saw with diamond on an edge.
Claim 17
Dependent Claim
25 words
A process according to any one of the preceding claims, wherein the cured composite material (III) is sliced with an inner diameter slicing diamond saw.
References Cited (Backward Citations)
EP0196865A2
Cited
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